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Protein Folding Levels
AP Biology · Unit 1 Chemistry of Life
Learning Objectives
Primary (1°): Linear sequence of amino acids (peptide bonds)
Secondary (2°): Local folding (α-helices, β-sheets) via backbone H-bonds
Tertiary (3°): 3D shape formed by R-group interactions
Quaternary (4°): Multiple polypeptide chains joining together
Tags
protein foldingamino acidalpha helixbeta sheettertiary structure
Primary Structure (1°)
Peptide Bonds
The linear sequence of amino acids coded by DNA. Held together by strong covalent peptide bonds between the carboxyl group of one amino acid and the amino group of the next.